<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>table</title>
    <style>

        table, th, td
        {
            border: 1px solid blue;
        }

        table
        {
            border-collapse: collapse;
        }

    </style>
</head>
<body>
<table>
    <tr>
        <td>1-1</td>
        <td>1-2</td>
    </tr>
    <tr>
        <td>2-1</td>
        <td>2-2</td>
    </tr>

</table>
</body>
</html>